My recommendation if you have to get a new one would be to
not get a Palm OS. The operating system makes it harder (or at least more
cumbersome) to get geocaching software to load waypoints, from what I've
found anyway.
Need recomendations for which Palm PDA to purchse, price is a
consideration! had an old one that died, then got a Palm m515 but has dead
battery-need a new one very soon! ( if I get a new battery for the m515 can I
install it myself??)